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Questions  >>  CBSE XI  >>  Math  >>  Trigonometric Functions
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If $(1+\tan A)(1+\tan B)=2$ find all values of $A+B$

$\begin{array}{1 1}(A)\;n\pi+\large\frac{\pi}{4}&(B)\;n\pi+ \large\frac{\pi}{6}\\(C)\;n\pi+ \large\frac{\pi}{8}&(D)\;2n\pi+\large\frac{3\pi}{4}\end{array} $

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